Forwarding you to

End of the Rainbow? New Map Scale is More Readable by People Who Are Color Blind - Scientific American

Data visualizations using rainbow color scales are ubiquitous in many fields of science, depicting everything from ocean temperatures to brain activity to Martian topography. But cartographers have been arguing for decades the “ Roy G. Biv ” scale makes maps and other figures difficult to interpret, sometimes to the point of being misleading. And for the those with color blindness, they are completely unintelligible .